【摘要】 本文对１９９８年１月１０日张北６２级强震的余震观测资料进行了初步处理。测定了２０５个ＭＬ≥０５的地震的震源位置，发现其余震多集中在一个长１０余公里，宽５～８ｋｍ的北东向条带内；计算了较大余震的震源机制解，推测引起主震的断裂带为北东向断裂；另外，对Ｐ波记录作了频谱分析，得到其拐角频率为１０Ｈｚ左右更多还原

【Abstract】 In this paper,a preliminary data processing was made for the aftershock records of Zhangbei 6.2 earthquake on Jan.10,1998. 205 earthquakes with M L0.5 we r e located.The result shows that most of the aftershocks are concentrated in a mo re than 10 km long,5～8 km wide belt with NE strike.The source mechanisms of lar ger aftershocks were also calculated,from which it can be deduced that the fract ured zone of the mainshock is the northeast strike fault.Furthermore,the spectra l analysis of P waves was made.The cornner frequence is about 10 Hz.更多还原